Automatic weighing machine



Feb. 2,1926. Q 1,571,460

J. B- VAN DEREN AUTOMATIC WEIGHING MACHINE Filed August 10, 1920 3Sheets-Sheet l 8 f4 17 l E m9 K J5 7 JJ Z5 22 GL N f5 7 [7 5 INVENTOR 41ATTORNEY Feb. 2 1926. 1,571,460

J. B. VAN DEREN AUTOMATIC WEIGHING MACHINE Filed August 10. 1920 5Sheets-Sheet 3 INVENTOR A TTORNE Y Patented Feb. 2, 1926.

PATENT )Ft liCE.

JAMES B. VAIt DE EN. OF HENNESSEY, OKLAHOMA.

AUTOMATIC FEES-KING IVIACHINIE.

Application filed August 10, 1920.

T 0 (ZZZ whom it may concern:

Be it known that 1. James B. VAN Dammit, a citizen of the United States,and a resident of .l-lennesscy in the county of King lish'er anc Stateof Olih-ihoma l I re invented a certain new and useful Automatic l' ieighing l dachine, of which the following is a specification.

My invention relates to auton'iatic inachines tor weighing apredetern'iined quantity of granular material as received from anelevator or a him and discharge the measured quantity into sacks orother receptacles.

The general object of the invention is to provide a machine that shallbe very accurate in its weighing and trip-eontroh and to this end theconstruction is such as to eliminate friction as far as consistent withmoderate cost of manufacture.

The invention will be better understood from reference to theaccompanying draiw ings, in .which corresponding numerals refer tocorresponding parts thruout and in which v Fig. 1 is a side elevation,with parts broken away, of my improved apparatus attachedto a grainelevator; Fig. 2 is a top plan view of the machine, one leg of theelevator being shown in section and the head the elevator omitted; Fig.3 is a side view of the trip and discharging mechanism the teed-panbeing in one of the discharging positions; Fig. 4 is a pers aective viewof the trio and discharge mechanism, omitting taught 39 and the U shapedlever 22 being broken away; Fig. 5 is a detail view of one of the tripdetents and its mounting. Fig. '6 illustrates a modification. partly inelevation and partly in plan; Fig. 7 is a frag 'mcntary bottom plan viewof some of the parts of Fig. 6; S is a side elevation oi anothermodification. the teed-pans being in section; Fig. 9 is a bottom planview of a portion ot a housing and one set or pivots supported therebyomitting the 'leed-pans of Fig. 8:, and Fig. 1.0 is a detail view of:the central pivot-bearing.

On Fig. 1. the portion of the. elevator shown comprises the legs 2, 3and the head 4L the latter including the usual depending spout Metalplates 6 secured to the spout 5 are provided with kniteedge pivots 7which support bearing rings 8, 9 on a scale-beam 10 and a companion.beamv 12 the latter h av- Serial No. 402,619.

ing an offset 13 secured to beam 10 with screws 14.

The ends of beams 10 12 are provided with knife-edge pivots 15, 16, onwhich are mounted bearing-rings 17. 18, integral with a pair oi castings1.9, 20 which are riveted to the top of the sheet-metal receptacle 21(see Fig. 3); thus said receptacle is supported from the two beams 10,12. Swinging ot the receptacle 21 is prevented by a ll shaped lever22.J3, whose ends are pivotally mounted on a horizontal rod or shaft 24,secured to elevator-leg 3. At the center of opposite sides of thereceptacle 21, lever arms 22 are connected thereto by pivots 25. Theconnecting portion 28 of arms 22 stands clear of the receptacle asshown. It is ob vious that when the receptacle 1n ves up or down theconnecting bar 23 will be moved in the same direction and further thanthe receptacle moves. The center of said bar 23 carries rigidly aninwardly projecting pin 2-6, which stops short of the adjacentreceptacle wall.

The bottom of the receptacle 21 proper is entirely open. Said receptacleis divided into two equal compartments by a fixed vertical. partition 11(shown in plan. on Fig. 2) secured to the walls thereof.

Supported by bearings (not shown) on the bottom of receptacle 21 is ahorizontal rock-shaft 27 having an upturned end 28 on which is a weight29. Fixedly mounted on rock-shaft 27 is an oscillating feed-pan B, madepreferably from a single sheet of: metal. The bottom of the teed-pan isformed in two symmetrical halves 30, disposed in planes having arelative angle. Each half is provided with a pair of upstanding flanges31, which lie outside of and close to the bottom of receptacle 21 butnot in contact therewith. The weight 29 on arm 28 tends to hold eitherhalf of the pan up against the receptacle (Fig. 3), in which positiiiineither halt of the pan will form a arain tighl. bottom closure for theoverlying chamber of the receptacle.

Secured to the inner wall at one upper corner ot partition 11 is abearing for a short rocleshatt 3-1 which extends out through thereceptacle wall to receive the hub of a cross-shaped lever 3637-38. Theupper arm 36 of this lever bears a counterweight 39. The transverse arms38, 38 are respectively connected by pivot-pins l0 to a pair ofdepending links 41, which are connected to the respective halves of thefeed-pan B by pivot-pins 42. The depending arm 37 carries an arcuate bar43 or detent-carrier, which extends symmetrically in opposite directionsfrom said arm. In each end of the part 43 is cut a vertical slot 4-1 inwhich is inserted a detent D comprising an end stop 45, an emergencystop 46, and a finger 47 upon which bears a spring 48 secured to bar 43.The detent is movably held in place by apivot-pin 49 passing throughdetcnt and bar 43. The lower portion of the detent will yield outwardly,while its inward motion is limited by a shoulder 50 abutting the partmarked 51. These two detents D are duplicates and are each adjusted sothat when the teed-pan is at either end of its travel one of the detentswill engage the stop-pin 2t, as shown, in all positions of: thereceptacle vertically except the lowest: at which time the pin 26 willbe moved down past the detent, thereby releasing the cross-lever,thelinks and the feed-pan.

The grain from the elevator is delivered to opposite sides alternatelyof partition 11 by an oscillated hopper (not shown) in spent 5 saidhopper being actuated through the medium ot a rod, etc., from a rockarm52 (Fig. 4) on shaft The grain will thus be fed upon either halt of theteed-pan until the predetermined weight of I ain is in the receptacle;then the receptacle will descend far enough to drop the stop-pin 26clear of the detent which has been held pressed against it. The closedhalf or": the teed-pan then drops and the con tents of the half of thereceptacle are dis charged from said half of the pan by gravity.Simultaneously, the other halt of the pan is raised to closed position,and the oscillated hopper (not shown) shifted to deliver material to theother chamber of the receptaclelVhile the receptacle 21 is dischargingit of course ZLSCQHC s-the reason being obvious-- and during this upwardmotion the trip-bar and stop pin or trip-pin 26 are raised relative lytothe arcuate arm 43, and said pin. moves up against the end 45. of thedetent adjacent, if the upper half of the feed-pan be 'lully closed. If,however, said halt should be held slightly open by seeds of grain or anyother particle, the pin 26 will engage the emergency shoulder 4.6instead. In either case the pin will hold; the detentcau rier -13 to oneside, thereby holding the feedpan in. proper position until it istripped by the aforesaid downward motion of the receptacle.

The detentsare made yieldablein one direction in order that eitherdetent may disengage itself from. pin 26 under certain accidental;conditions, not necessary to describe herein,

This weighing-machine has been thoroly tested and has been found toexcel in accuracy any other weighing machine which I have similarlytested.

The construction of the oscillating feedpan herein described may bemodified in several respects, without sacrificing any of the advantagesattaching to the form shown or to the machine as a whole.

For Xflll'lPlG, the feed-pan may be constructed in two separate equalparts, as I have represented in. Figs. 6 and 7. Part 57 is formed withspaced hinge-sleeves 58, and part 59, with alternating hinge-sleevcs(it), all being mounted on a rod ($1 held by fixed bearings The links 63correspond with links 41-.- ot Fig. 3, and operate in the same manner.The pivots (i i; are set further below the pansthan in the said Fig. 3.

Still ano ier practicable construction is shown by n s. 8, 9 and it). InFig. 8, each half of the oscillating 'teed-pan is made in twosections,although the inner sections oi: the two may be made integral, as isshown. 01, the inner halves 65 of the two pairs of pan sections may beseparate. Tn either case the horizontal rod 66, supported in bearings 67on the receptacle 68, forms the central pivot upon which the parts 65are oscillated. The outer quarters, (39, are made separate from theinner quarters, and are pivoted on studs 70 held by lugs 71 riveted tothe bottom band of the receptacle 68. The four pivots 72 are supposed tobe attached to the bottoms 65, 69 with suitable bearings and at equaldistances from the main pivots (36, 70. The pivots 72 of each half areconnected to a pair of toggle links 73, and each pair of. the latter isconnected at upper ends to the lower end of a vertical linlr '2 bypivot-pins 75. The operation oi the whole will be perceived withoutfurther description.

Having thus described my invention, what I claim, and desire to secureby Letters latcut, is:

1.111 con'ibination, a receptacle divided into'two equal chambers, anoscillating feedpan centrally pivoted to the bottom of the receptacleand comprising halves inclined at an angle to each other; an oscillatingweighted arm mounted upon one side of the receptacle; and linksconnecting said arm with respective sides of said teed-pan.

2. In. combination, areceptacle suspended from a scale-beam, a. U-shapedlever pivoted near one side of the receptacle and extend inghorizontally around three sides of the latter; aligned pivotalconnections between the parallel arms of said lever and the adjaeentwalls of the receptacle, a stop-pin held by the central portion of saidlever, an oscillating arm mounted upon the receptacle, a pair ofd'etents carried by the oscillating arm, an oscillating teed-pancentrally pivoted to the bottom of the receptacle and comprising halvesinclined at an angle each to each, and means actuated by said feedpan toactuate said detent-carrying arm, for the purpose specified.

3. In an automatic weigher, a receptacle divided into two equalchambers, an oscillating feed-pan centrally pivoted to the bottom of thereceptacle and comprising halves inclined at an agle to each other, arockershaft, a cross-shaped lever including a rocker-arm 37 on saidshaft, link means pivotally connecting between said lever and thefeedpan, a crossbar 43 on said rocker-arm, detents in both ends of saidbar, adapted to engage with any suitable trip-device, and an arm 52rigidly attached on said shaft and adapted to operate any suitablehopper or deflector.

l. In an automatic weigher, a scale beam, a receptacle suspended fromsaid scalebeam, a U-shaped lever pivoted near one side of the receptacleand extending horizontally around three sides of the same, a stoppinheld by the central portion of said lever, a rocker-shaft, a rocker-armon said shaft, a crossbar having detents in both ends thereoi andadapted to engage said stop-pin, an oscillating feed-pan centrallypivoted to the bottom of said receptacle and comprising halves inclinedat an angle to each other, and means actuated by said teed-pan toactuate said detent-carrying arm for the Durpose specified.

5. A duplex feed-pan construction, comprising a central pivot-rod, anintegral balanced pan-member 65 mounted on said rod, each half of saidmember providing one half of a duplex construction, pivot-rods 70,equally spaced in opposite directions from said central rod, outerhalf-pan mem bers 69 pivoted on said rods respectively, a verticallyextending link '44 disposed at the meeting ends of each pair of panmembers 65-69, toggledinks 73 pivotally supporting said pan members fromeach of said links, and means for actuating said links oppositely andsimultaneously.

6. In an automatic weighing machine, a container having twocompartments, feed pans for controlling the discharge openings of saidcompartments'said feed pans being pivoted near the dividing partition ofsaid container, a rocker pivotally mounted above the plane of said feedpans and links connected to respective sides of said rocker and to saidfeed pans respectively at points below the plane of the pivots ot thefeed pans.

7. In an automatic weighing machine, a container having twocompartments, a centrally pivoted feed pan having wings at an angle toeach other, a pivotally mounted rock lever, power transmitting meansconnecting said pan to said lever and a trip lever pivotally connectedto said container and to a relatively stationary object Illlttoperatable by downward and upward movement of the container, to lock andunlock the feed pan.

JAMES B. VAN DEREN.

